Perforated card controlled alphabet and numeral printer



March 16; 1948. R. E. PAGE ETAL 2,438,071

PERFORATED CARD CONTROLLED ALPHABET AND NUMER AL PRINTER Filed Dec. 23, 1944 9 Sheets-Sheet 1 ATILORNEY Mamh 16, 1948. R. 12. PAGE ETAL PERFORATED CARD CONTROLLED ALPHABET AND NUMERAL PRINTER Filed Dec. 23, 1944 9 Sheets-Sheet 2 lNV ATTORNEY March 16, 1948. R, 5 PAGE ETAL 2,438,071

PERFORATED CARD CONTROLLED ALPHABET AND NUMERAL PRINTER Filed Dec. 23, 1944 9 Sheets-Sheet 3 l mvsrnog; 5/ V i4 March 1948- R. E. PAGE EI'AL 2,438,071

PBRFORATED CARD CONTROLLED ALPHABET mERAL PRINTER Filed Doc. 23, 1944 9 Sheets-Sheet 4 FIG-.4.

AT-TORNEY March 16, 1948. R 5, PAGE 5 AL 2,438,071

YERFORATED CARD CONTROLLED ALPHABET AND NUMERAL PRINTER Filed Dec. 23, 1944 9, Sheets-Sheet 5 FIG. 5.

' ATTORNEY March 16, 1948. 5, PAGE r 7 2,438,071

PERFORATED CARD CONTROLLED ALPHABET AND NUMERAL PRINTER Filed Dec. 23, 1944 9 Sheets-Sheet 6 O X R m no; I; 1&JA 1 25KB 2 3TLC 3 u, 4UMD 4 g 5VNE 5 GWOF 6 ail/HG 7 FIG] 8. 8YQH 8 92R! 9 0 1232 37, O INV o s a- 4()./ 1 0 a z ATTORNEY March 16, 1948.

R. E. PAGE EI'AL PERfORATED CARD CONTROLLED ALPHABET AND NUMERAL PRINTER 9 SheeLs-Sheet 7 Filed Dec. 23. 1944 A-TTORNEY 9 Shets-Sheet 8 March 16, 1948. R. E. PAGE EI'AL PERFQRATED CARD CONTROLLEQALPHABET AND NUHERAL PRINTER Filed Dec. 23, 1944 ylNvEifR m ATTORNEY March 16, 1948. R, PAGE Em 2,438,071

PERFORATED CARD CONTROLLED ALPHABET AND NUMERAL PRINTER Filed Dec. 23, 1944 9 Sheets-Sheet 9 ATTORNEY Patented Mar. 16, 1948 PERFORATED CARD CONTROLLED ALPHA- BET AND NUMERAL PRINTER Ralph E. Page, West Orange, N. 1., and Horace S.

Beattle, Poughkeepsie, N. Y., assignors to International Business Machines Corporation, New York, N. Y., a corporation of New York Application December 23, 1944, Serial No. 569,444

24 Claims. 1

This invention relates to printing mechanisms in general and more particularly to the type wherein alphabetic, numeric, or special symbol printing can be performed under control of perforated instrumentalities, such as record cards.

The main object of the invention is to devise a printing mechanism of the above type that has an augmented type printing capacity without requiring additional card holes in a card column. In other words record cards having a limited number of card holes in each column such as 9-0, X, R are capable of selecting by the improved printing mechanism and coordinated control structure more printing type than possible heretofore.

A feature of the-present invention is to enable a record card of the 1-9, 0, X, R hole type to be utilized to control the improved printing mechanism to select more printing type than possible heretofore. As in printing mechanisms of the type heretofore devised each of the digit holes 1-9 in combination with O, X, R are also capable of selecting ten digit type and twenty-six alphabetic type, but this prior limitation is exceeded in the present machine by enabling the selection of twelve additional symbols without requiring additional card holes.

An object of the invention is to provide means to select a group of type symbols under control of card perforations appearing in combination such as 8-4, 8-3, for example, and to select type of such group in accordance with the associated O, X, R holes, and in the absence of such 0, X, R holes to effect by a machine controlled means the remaining type of such group.

Another object of the invention relates to means operating independently of card holes 1-9 and in the absence of such type group se lectlng perforations l-9, or the aforesaid combinations of holes 8-4, 8-3 to select a group of symbol printing type, and to select by the 0, X, R holes the particular symbol type desired.

A still further feature and object of the invention is to cause the invariable printing of a special character in the absence of any card holes in a controlling column.

Another object of the invention which has particular relation to the type group selecting means controlled by combinational holes is to incorporate in the machine an improved type of combinatlonal hole translator capable of effecting a combinational setup and subsequent conversion to a differentially timed impulse, mechanical in nature.

Another object relating to the specific construction of the translator is to 'devise a translator of 'a rotary type and capable of high speed to control a printing mechanism of a construction operable at such speeds.

In this connection it is an object of the invention to devise a translator for each printing order so that it occupies no more space, as far as its width is concerned, than the controlled printing wheel.

A still further object is to devise parts of each order of the translator so that they be located and conjointly operate in a narrow plane, and wherein the width of each order of the translator is coextensive with the width of other parts of a printing order. The result of the above construction is that the desirability of providing large column printing capacity is not diminished by the provision of the aforesad translator.

The results obtainable from a construction of the improved printing mechanism herein disclosed indicate that the objects have been reached in an admirable and efficient manner. The machine is capable of selecting forty-eight printing type by a printing mechanism of the rotary type providing digit, alphabetic and symbol printing meeting the present character printing requirements. The necessary and desirable characteristics of high speed, efficiency in operation, large column printing capacity, extended character printing capacity, and the capability of being controlled by standard record cards, i. e., those perforated in holes l-9, O, X, R, have been supplied by the present arrangement.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Figs. 1a and 12; when assembled with Fig. hi on the top shows the construction of the improved numeric and alphabet printing mechanism.

Fig. 2 is a detail of an overthrow preventing mechanism.

Fig. 3 is a view in side elevation showing the intergearing for driving the driving shafts of the printing mechanism-in synchronism.

Fig. 4 is a sectional view taken on the 4-4 of Fig. 3.

5 is a sectional view taken on the line 55 of Fig. 3.

Fig. 6 is a sectional view taken on the line 8-8 of Fig. 4.

Fig. 7 represents the card perforation code and illustrates the alphabetic, numeric characters and other symbols selected by perforations appearing in a column, singly or in combination.

Fig. 8 is an electrical diagram showing the analyzing circuits and the alphabetic and numeric listing circuits controlled by the card perforation analyzing mechanism.

Fig. 9 is a timing diagram of the machine.

line

Fig. 10 is a. view in side elevation of the card feeding mechanism.

Card feeding and analyzing devices The card feeding and analyzin devices employed to control the improved printing mechanism shown herein are similar in construction and operation to the form disclosed in the patents to J. R. Peirce, No. 1,827,259, dated October 13, 1931; No. 2,042,324, dated May 26, 1936; and No. 2,199,547, dated May 7, 1940.

The card feeding mechanism is shown generally herein in Fig. 10, As is well known, card feeding operations are initiated by the usual manual start key so as to cause the energization of a card feed clutch magnet which causes the cards to be fed singly from the supply hopper Ill by the usual card picker mechanism comprising a slidably mounted reciprocable plate I I carrying a picker knife l2 for cooperation with the record cards. The plate II has a pin and slot connection I3 with an arm l4 secured to a rock shaft I5. Shaft i5 is rocked by the card feed operating mechanism to reciprocate picker knife 12 to cause the card to be fed from the supply hopper, I 0 to the analyzing mechanism and the card is presented in succession to UB analyzing brushes l6 and LB analyzing brushes [1.

The feeding of record cards from station to station and to ejection is effected by pairs of feeding rollers l8 having the customary driving gear connections to the card feed operating mechanism. The cards pass from the last pair of rollers l8 to a card stacker I9, that shown being of the rotary type, The cards are fed to a storage hopper 20 in the original order. As is usual in the form of card feeding mechanism shown, the machine includes cam operated contacts which consist of the CF contacts driven by a shaft 2| which is rotated one revolution for each card feeding cycle.

A constantly running shaft 22 which rotates one revolution for each machine cycle is utilized to operate the CR cam contacts, designated in the wiring diagram, and other parts of the machine.

Interposed between the constantly rotating shaft 22 and the driving shaft of the feed mechanism is the .usual card feed clutch magnet (magnet 48 of Fig. 6, Patent No. 2,042,324). The manner of energization of this magnet to initiate and maintain card feeding operations as long as cards are fed is very well known and for this reason is not explained herein in detail.

In general, two card feed cycles are initiated by an initial depression of a Start key and a redepression thereof, and the card fed during the second card feed cycle closes card lever contacts LCL. The latter are closed when cam contacts CF8 close at 207 (Fig. 9) and by an obvious circult an impulse will be directed to relay coil R3 (Fig. 8).

Relay coil R3 closes its contacts R3C and a stick circuit extends from one side of the line 23 through the R3 magnet, R30 contacts, CF9 cam contacts to the other side of the line 24. If card lever contacts LCL are closed when cam contacts CFB are open, relay coil R3 will be held energized,

' the energization of the latter then being effected through the card lever contacts LCL and cam contacts CF8. When relay coil R3 is energized, it will close its contacts R3A, thus connecting the contact roll of the LB analyzing brushes I! to the circuit breakers CR! and CFI. As long as card feed operations continue, LCL contacts will remain closed to maintain the energization of the relay coil R3 and the closure of its contacts R3A, rendering the LB analyzing brushes I'l effective. After the second manually initiated card feed cycle, successive card feeding cycles automatically ensue as long as cards are fed. For

each passage of a card past the LB analyzing brushes, the improved printing mechanism now to be disclosed in detail is controlled so as to print data represented by the card perforations analyzed. P

In Fig. 1a reference numeral 38 designates the printing impression drive shaft which is driven with a uniform speed of rotation for each cycle of the operation of the machine. The drive shaft 22 has secured thereto a gear 40 (Figs. 3 and 4) which drives a gear 41 secured to the printing impression drive shaft 58 to rotate the latter at a uniform speed of rotation one end a half revolutions for each revolution of drive shaft 22. Reference numeral 39 designates the type selecting drive shaft which rotates two and onetwelfth revolutions for each operating cycle. At times shaft 39 is driven with a uniform speed of rotation substantially synchronous with the drive shaft 38, but at other times the speed of rotation given to shaft 39 is decreased or increased with respect to the drive shaft 38 for a purpose to be more clearly understood later on. The variable drive for driving shaft 39 at the desired speed will now be described in detail.

Means to drive shaft 39 at variable speeds (Figs. 3-6) To the side of the gear 40 and at the periphery thereof there are secured segmental bearing plates 42,43. The plate 43 is provided with hearing slots 44 and plate 42 with hearing slots 45. Slidably mounted in such bearing slots is a cam follower plate 46. Hence, plates 42, 43 provide the bearing or support for the slidably mounted cam follower plate 46. Obviously, since the gear 40 carries in this manner the cam follower plate 46, the latter rotates with the gear 40 about the shaft 22 in the same counterclockwise direction (Fig. 3).

Cam follower plate 46 carries a cam follower roller 41, fitting in a cam race 48 of a cam plate 49 which is fixed by studs 50 to a stationary frame plate 5|. The cam follower plate 46 has an extension 52 (see Figs. 3 and 6) which carries a stud 53 (Fig. 4) and carried by the stud 53 is a square block 54 fitting between plates 55 secured to one side of a gear 56. So far it is obvious that drive shaft 22 drives the gear 40 andthrough the connecting cam follower plate 46 the gear 56 is driven. The cam race 48 is so designed that the cam follower plate 46 may be moved away from or towards the center of the shaft 22 and to do this without interference the plate 46 has a longitudinal slot 51 (Fig. 6) encircling the shaft 22. Also in view of the movement given to gear 56 at times resulting from the movement given to cam follower plate 46 by the cam race 48 and which movement is relative to the gear 40, the gear 40 has an elongated slot 58 (Fig. 6) through which the stud 53 passes.

-The gear 56 (Figs. 3 and 5), through the gear 59, drives the type selecting drive shaft 38 and thus the latter through the variable gear drive just described is driven at a variable speed through the operating cycle of the printing mechanism. For the proper operation of the machine disclosed herein shaft 22 is driven counterclockwise as viewed in Fig. 3.

four printing type past the printing line for 27.

Between 120 and 270 of the cycle of operation the roller 53 will cooperate with a substantially concentric portion of the cam race 43, and since there will be no movement of cam follower plate 43 during this period gear 56 will be driven counterclockwise at the same speed of rotation as the gear 40. When the cam follower roller 41 enters an eccentric cam portion between 270-300 the speed of rotation of the shaft 39 is reduced so that four printing type are presented for 27. Between 300-345 the eccentric part of cam race 48 so reduces the speed of shaft 39 that for each 15 only one printing tooth (IT) will pass by the printing point. At 300 the alphabet type which would be selected by the pilot hole will be adjacent the printing line. At 315 of the cycle of operation the alphabet type of the selected group selected by the X pilot hole will be in position for printing, at 330 the alphabet type selected by the R pilot hole will be in a position to print and at 345' the numeral type of the selected group will be in position to efl'ect an imprint therefrom. Therefore, the slowing down of the speed of the rotation of shaft 39 is provided to selectively effect printing from the selected alphabet or numeral type of the selected group.

During the time that the cam follower roller 41 enters the very eccentric cam portion of cam race 43 between 300-345, the cam follower plate 43 under control of the cam race 48 moves outwardly (Fig. 3) with respect to the center of the shaft 31, thus, rotating the gear 56 in a clockwise direction opposite to the counterclockwise direction of rotation of the gear 40. This will result in diminishing the speed of rotation of the gear 53 and shaft 39 during the analysis of the O, X and R index point positions as just described.

After this reduction in speed of gear 56 the follower roller 41 then enters the cam portion after 345 and the latter is so designed as to move plate 46 inwardly (Fig. 3) towards the center of shaft 22 to cause gear 56 to rotate counterclockwise at a speed increased with respect to the gear 40. This increase in speed is initiated at 345 of the operating cycle and continues on over to the next operating cycle to 120 thereof. This increase in speed during such portions of successive machine cycles ensues to make up for the previous relative displacement of gear 56 so that at 120 of the cycle the gears 40 and 56 and parts driven thereby are always at the same relative position.

Alphabet printing mechanism arranged according to the code shown in Fig. 7.

The particular 0, X and R perforation appearing in a column determines which of the several in either the O, X, or R. positions. the digit 2 will be printed. If a hole is also at 0 such hole will select the type B; if at the X index point position, type K will be selected and if at the R position type B will be selected.

Each index point position selects a group of three non-numeral type and also a numeral type. As will be later described, if a numeral type is to be selected for printing, the printing impression will be taken at the "N point in the machine cycle, which point is after the R index point position is analyzed (see Fig. 9, timing for N impulse). The alphabet type selection is provided for by taking printing impressions before the time a numeral type would have been printed and this is effected under control of the holes at 0, X and R index point positions.

If the hole is at the 9 index point position alone, a printing wheel 60 (Fig. 1a) will be rotated counterclockwise until the 9 type is at the printing line and then the printing wheel 60 will be rocked by the N pulse to effect the printing impression. It will be noted that if a perforation is also at the R position, then under control of this perforation the printing wheel will be rocked earlier than for printing the digit 9 to take an imprint from the I type. The perforation at the X position will rock the printing wheel 60 to take an The card is perforated with holes to represent 6 the digits 0-9 and X, R and is passed by the analyzing brushes ll of the card feeding mechanism previously described to analyze the index points in the order 9, 8, 7 1, 0 X and R.

By circuits to be subsequently described, when an analyzing brush senses a hole in any of the index point positions 9-l, a circuit is closed to a printing control magnet 6| (Fig. Lb) and for each card column analyzed there is a printing control magnet. Differing from the construction shown in the patent to F. L. Fuller et al., No. 2,199,561, in which case the energization of the printing control magnet directly initiated the differential rotation of the type carrying wheel 60, in the present machine by mechanisms to be subsequently described in detail, this initiation is effected by the actuation of an operating link 63 (Fig. 1a) at a differential time. For selection of type groups determined by the holes 9-1, such operating link 63 is shifted to the left at differential times between -270 of the operating cycle as is shown in the timing diagram (Fig. 9). It will also be recalled that during this time shaft 39 is being rotated at a uniform speed of rotation. The shifting of the operating link at differential times is provided herein to transmit a differentially timed mechanical impulse to trip the type selecting clutch shown in Fig. 1a, now to be described in detail.

For each printing order there is pivoted on a rod 66 a triple arm member consisting of arms 64, 65 and a clutch release arm 61.

Shaft 39 has secured thereto a tube 68 which is fluted transversely along its periphery to provide clutch notches 69. Tube 68 constitutes the driving clutch member. Encircling the clutch tube 68 is a plurality of gears there being one gear for each order of the printing mechanism. For mounting the gears 18 on the clutch tube 88, each gear has integral therewith a flange 12. To provide for the lateral spacing between the gears 18, the ears are guided by guide slots ll formed in guide blocks l3, l4 and 15. By such spacing members the gears 18 are separated to allow inde-- pendent rotation and to also locate a clutch pawl '16 which is pivoted on the releated gear to cooper-ate with the clutch release arm 61. The clutch release arm 6'! normally holds the clutch pawl '16 in such position that its tooth H is out of engagement with any of the clutch notches 69 of the clutch tube 68. When the clutch release arm 6'! is rocked as a result of the actuation of the operating link 63 at a differential time, the clutch is engaged because a spring l8 attached to clutch pawl 16 will rock the latter in order that the clutch tooth T! will engage a clutch notch 68 determined by the differential time the operating link 63 is actuated. The above described clutch is the printing type selecting clutch and causes the differential rotation of the printing wheel 60, since the gear 18 and the printing teeth of the type carrying wheel 60 are intergeared.

Figs, 1a andlb show the arrangement of the printing devices for a single order and the machine is preferably provided with duplicate devices for printing a plurality of characters.

If the operating link 83 was shifted at about 138 as a result of a hole at the 9 index point position of the controlling column, the clutch release arm 61 would be rocked at this time and pawl 18 would be released and rocked by spring I8 so that clutch tooth I1 engages a clutch notch 69 and printing wheel 68 will thereafter continue to rotate to such position as to successively present the characters Z, R, 1 and 9 of the group selected by the 9 hole (see Fig. '7) to the printing line between 333-345. The differential time at which the operating link 63 is actuated determines the extent of counterclockwise rotation of the printing wheel 80 necessary to select a group of type for printing between 330-345. After the predetermined extent of rotation of the printing wheel 88 has been effected and the printing impression has been effected, with the type selecting clutch still engaged, the printin wheel 60 will continue to rotate until the free end of the clutch pawl 16 strikes the clutch release arm 61 whichyin'the meantime, has been brought to its normal position, by means of a compression spring 19 (Fig. 1a). When such disengagement is effected the printing wheel 80 is at the normal position shown in Fig. 1a.

Each printing wheel 60 is carried by an arm 8| loosely pivoted upon a rod 82 and provided with a rearwardly extending follower extension 84 which is operated by a cam projection 83 of a cam disk 85 which constitutes a driven member of a 10. Associated'with the clutch pawl 8'! isa clutch release arm 88. When the clutch engagement is effected between the clutchpawl 8'land one of the clutch notches of the clutch tube 86, the disk 85 will be rotated in a clockwise direction, whereby the cam projection 83 will cooperate with the follower extension. 84 to rock arm 8| about the rod 82 against the action of the return spring 89.

The en agement of the clutch now being dedescribed is effected at differential times when the printing control magnet SI for each order is again energized under control of the O, X and R card controlled impulses, if one of the corresponding holes is present in the related column.

At the present time it should be understood that while the O, X and R index point positions are being analyzed, the clutch release arm 88 will be rocked to clutch release position as a result of the analysis of such holes. As a result of this clutch engagement, the cam extension 83 approaches the follower extension 84 at the time shaft 39 is rotating at a diminished speed between 330-345, to present the type of selected group successively to the printing line. Thus, the particular type which is to be selected from the selected group for printing will depend upon the differential time that the printing control magnet El receives a second impulse and, therefore, the time at which the printing clutch is engaged. If the O perforation is analyzed, the printing clutch is engaged at the earliest time so as to select the first alphabet type of the selected group. If the perforation is at the X index point position, the printing clutch is engaged at a later time when the next alphabet type of the selected group is at the printing position and obviously when the perforation is at the R index point position, the printing clutch will be engaged at a still later time when the third successive alphabet type of the selected group is at the printing position. By the engagement of the printing clutch at a differential time the desired alphabet type and the numeral type of the selected group may be selected.

When the printing clutch engagement has been effected, each cam 85 will cooperate with the related follower extension 84 to rock the associated printing arm 8| to force the printing wheel 68 against the usual inking ribbon and platen 88 around which platen is positioned the paper strip to be imprinted. As each arm 8| is rocked against the action of the spring 89, the printing wheel 60 is being rotated counterclockwise but since the printing wheel is now rolling over the gear 78, this rolling action will cause an equal and simultaneous rotation in a clockwise direc-v tion. Both of these opposite rotations will, in effect, cause the printing wheel to be immobile with respect to its rotation when it moves to the right to strike .the platen 90, the type striking the platen squarely and firmly to cause a legible impression.

After the printing operation, when cam extension 83 of the cam disk 85 passes by the follower extension 84, spring 89 will now be effective to return the type wheel carrying arm 8! to normal position and the extension 84 now bears against the circular peripheral edge of the cam disk 85.

After the printing operation, since the type selecting clutch is still engaged, the printing wheel 68 continues to rotate as previously stated until the clutch pawl 15 strikes the clutch release arm 61 which, in the meantime, has been positioned to no-rmal, thereby disengaging the type selecting clutch when the printing wheels are a normal position.

The printing clutch continues its engagement fora complete rotation of the cam 85 and the clutch disengagement is effected by the engage- 9 ing clutch is effected by striking the clutch release arm 91," there is a tendency of the clutch pawl I9 to rock counterclockwise about its pivotal point, unduly stretching the spring I9. To prevent this action a cushioning arrangement is provided to hold the pawl 16 and is shown partly in the lower right hand comer of Fig. 1a and more completely in Fig. 2. In a preferred arrangement this constitutes for each type selecting clutch a double arm 92.- One arm cooperates with a cam portion 99 of the clutch pawl I9 and the other arm bears against a spring pressed plunger 99 inserted in an aperture 95 partly filled with oil. As the clutch pawl 19 comes around to its normal position, it will strike the clutch release arm 91, forcing its clutch tooth I1 out of the clutch notch 99 it previously engaged and the cam portion 93 of the clutch pawl I6 will strike one arm of the double arm 92, forcing the opposite end downwardly to press the plunger 94. This will force the oil out of the bottom of the recess "and around the plunger 94, thus providing a cushioning action on the arm 92 to restrain the clutch pawl I6 so that it cannot move too far outward.

As the free end of the clutch pawl I6 strikes the clutch arm 91 there is a tendency to cause the gear 19 to rebound counterclockwise. This action is prevented by the cooperation of a spring pressed detent 96 with a shoulder 91 of a plate 99 secured to each gear I9. When the normal position of the clutch is obtained, the detent 96 will engage the shoulder 91 to prevent such rebound and retain the clutch parts in their normal Position. 7

A somewhat similar rebound preventing mechanism is also provided for the printing clutch which consists of a spring pressed detent 9| cooperating with the shoulder 99 of the cam disk 95.

Translating and impulse converting arrangement The purpose of the above arrangement herein is to translate and convert difierentially timed electrical impulses to mechanical impulses and delay the transmission' of each mechanical impulse to a later point in the cycle for the purpose of selecting a group of type corresponding to the differentially timed electrical impulse transmitted by the hole or holes analyzed.

In prior printing arrangements of the general type shown herein, as exemplified in the patent to F. L. Fuller. et al., No. 2,199,561, the first electrical impulse from the card holes 9-1 was directly utilized for type group selection. Herein the converted and delayed mechanical impulse is used for the purpose 01' type group selection. The arrangement for one denominational order is shown in Figs. 1a, 1b, and 2.

Cams I99A, I99B, I99C and I99D are driven by driving means tobe subsequently described one revolution for each cycle of operation. of the machine. It will be noted that these cams differ in their cam contours and the particular cam portion which is effective in each point of the operating cycle is shown in the timing diagram of Fig. 9. Each of the cams is provided with cam heights which are identified by three dotted circles associated with the cam I99A (Fig. 1b), which circles are of three different diameters and represent the heights of the cam contours as low, "medium" and high. The corresponding designation is shown in the timing diagram of Fig. 9 for such cams to identify the particular cam portion effective in each point of the operating cycle. The cams I99-A, I993, I990 and I99D may for convenience in construction be extended longitudinally as shown in Figs. 4 and 5 to provide fluted cam rods having the configuration and outline in Fig. 1b to cooperate with a plurality of orders.

Each cam I99 cooperates with a related releasing and blocking member H9. The reason that the member I I9 is called releasing member is that when elevated a predetermined distance by the "medium or "high" cam portion of the related cam I99 it will release the operating link 63 for movement but when in its normal lower position (due to the "low" cam portion) it will block the link 69 against movement. Each member I I9 is slidably mounted in a slot I9I of a guide block I92 and is further guided by a rod I94 which recelves a guide slot' I99 of the related member II9. Also pivoted on a rod I95 carried by the block I92 is a latch pawl I96. Interposed between the pawl I96 and the associated member I I9 is a compression spring I91, the spring I91 functioning to urge the member H9 downwardly so as to always press against and contact with the cam contour of the related cam I99. Each member I I9 is provided with a shoulder I98 cooperating with a lug I99 formed as an integral part of thelink 63.

The link 63, referring to Fig. 1a, is slidably mounted in guide slots formed in a support plate II I' to support the link 63 at one end and guide its movement, and referring to Fig. 1b the other end of the link 63 is dependently hung by arm II3, which arm has a cam follower extension II8. A compression spring II4 fitting in a spring support and guide block for arm II3 urges the link 63 to the left and when such spring is eifective for action under control of a cam I25 it serves as the source of mechanical impulse transmitted to link 63 at a diiferential time to rock the clutch release arm 61 to initiate type group selection.

Recalling now that each cam I99 has cam contours of three difierent heights, it should be observed that when member II 9 is at a position determined by the low portion of the cam I99, the shoulder I98 abuts lug I 99 to block the link 63 from movement to the left, urged by compression of the spring I I4. In attempting to do so lug I99 will bear against the shoulder I99 and urge the member II9 clockwise, which movement is restrained by the cooperation of an upstanding hooked portion II2 of member II9 against the latching end of the pawl I96. Assuming now that a cam has been rotated so that the medium" cam portion of the cam contour has raised the member II9, such difference in cam height with respect to the low cam height will elevate shoulder I99 slightly further above the related lug I99 and by the continued cooperation of the hooked extension II2 of the member II9 with the extremity of the pawl I96, clockwise movement of the pawl III) will be still restrained.

Assuming now that the high cam portion has positioned the member I I 9 to its maximum height, the shoulder I98 will be still further above the lug I99 and the member I I9 is now in such position that the compression spring I9'I will be effective to rock the member I I9 clockwise so that a hooked extension II2 will catch over the latch end of pawl I96, provided that at this time the pawl I96 is rocked counterclockwise due to the concurrent analysis of a hole in the card at the time the member H9 is in its highest position. If the pawl I96 is not rocked slightly counterclockwise, no latching of the member II 9 will take place. Summarizing, whenever the high portion of a cam has elevated a member II9 to the highest position, such member will be latched ii the re- 9,4sao71 i ll lated pawl its is concurrently rocked to latching position. If there is no rocking of the pawl W3 this time, member i W will not be latched, and will be subsequently free to move up and down accordance with th successive cam contour the related cam rotates.

The above description has been confined to the operation of the parts under control of the cam but it should be noted that identical opera= tions are effected under control of the remaining cams lhilB, filth? and ihllD. For this reason, the description of operation need not be repeated for duplicate parts.

For the purpose of rocking the pawls m8 to latch those members lit) which are at their highest position at the time a hole is sensed in the card, it will be seen that referring to Fig. 1b each printing magnet 65 when energized attracts an armature M5 and rocks the same so as to shift a related connected link i il to the left. Depending from the link i 96 are four integral extensions Ml, each of which cooperates with the related pawl 966. The result of this construction is that the impulse directed to the magnet M will shift the link Hit and rock the four pawls ms concurrently but only that pawl W6 is effective for latching'the related member l ill if the associated member lit has been elevated to its highest position. Therefore, one or more of the pawls I08 may be rocked idly at the same time without latching the related members III].

To prevent the armature M5 from sticking to the core of the magnet 6i due to residual magnetism, it is desirable to provide means to positlvely restore the link ll 6 and armature II5 to normal by mechanical means timed with the rotation of the cams I80. To this end there is provided at magnet knockoff cam I (Fig. 1a) notched as shown. A follower arm I2I of a clutch release arm I24 cooperating with the cam I20 has a mechanical connection I22 with the link H6. At the time the magnet BI is energized it will be observed that follower arm I2I cooperates with a notch I20a of the cam I20. Thereafter, such arm cooperates with the following cam portion I20?) to rock arm I2 I, link I I6 and armature I I5, restoring the armature H5 to normal if it should remain attracted to the core under the above circumstances.

Referring now to Fig. 9, it is obvious that at the time the card holes 9-1 are analyzed, one or more cams I00 will have their high portions in cooperation with the latching members I Ill. At the time the 9 card hole is analyzed the high portions of cams IUUA and I000 will be effective. At the time the 8 card hole is analyzed, only cam IOIIA will have a high portion effective at this time. For all of the card holes 9-1, this condition may be represented by the following table:

Holes Members 110 latched 110B. 110C. 110D. 11013. 1100.

110B, HOD. 110D, 110C. 110B.

Human-aqua latched and therefore free to be positioned according to the contour of their cams during their subsequent rotation. It is explained that once a member Ill] is latched it is not free to thereafter move upwardly and downwardly in accordance with the subsequent cam contour of the related cam, but remaining unlatched members can do so.

Movement of the operating link 83 to the left during the time that the 8-3 holes are analyzed, which movement might be permitted if all of the four members liil for this order may be either latched or elevated so as to be above the lugs W9, is restrained by a cam portion l25a of cam E25 (Fig. lb). This cam, through driving means to be subsequently explained, is driven synchro nously with the cams not and IE0 and cooperates with the follower extension H8 of arm H3. As shown in the timing diagram, during the analysis of 8-3 holes, the high portion l25a of cam 625 ygill restrain movement of the operating link 53 to the left.

After latching of members Ilil in predetermined combinations the contour of the cams lilllA, lflilB, lilllC and IllilD which are thereafter effective will determine the time in the operating cycle that the operating link 63 will be moved to the left in a manner now to be described in detail:

After one or more members H0 are latched in combination accordin to the holes analyzed as indicated in the preceding table, the further rotations of the cams I00 will raise and lower the remaining unlatched members H0 according to the cam contours of the respective cams, but during said further rotation of the cams the link 63 will be restrained against movement by one or more of such unlatched members until a point is reached in the operating cycle when the cams related to the unlatched members concurrently present cam operations of medium height to the unlatched members. It will be recalled that since the latched members II!) are so positioned that they do not restrain the movement of the link 63 under the influence of the spring I Hand further the elevation of any unlatched member by a cam portion of medium height will also unlock the link 63, it is obvicus that when both of these conditions exist for four of the latches in the highest position so that they unlock the operating link 63 at such positions. However, cams IOllB and IOUD in their subsequent rotation continue to raise and lower the related unlatched members IIOB and II 0D and one-or the other of such unlatched members HOB,

IIOD will restrain the operating link 63 from movement until about 138 of the operating cycle,

at which time both cams I NE and I IUD, through their medium high cam portions, shift related latching members HOB and IIOD to unlock the link 63. At this time cam follower extension H8 01 the arm II3 will cooperate with thenotch.

I25b designated 9 in both Fig. 1b and the timing diagram of Fig. 9. "Operathig link 63 is At this time, the members I I DA and I IOC are latched 13 now unlocked at four points and the movement of the link to the left is effected at about 138 by spring H4. The link will now operate the clutch release arm 81 and therefore engage the type selecting clutch to initiate the rotation of the printin: wheel 88 to select the group of type, 9, Z, 3

The type selecting clutch will be engaged at about 150 of the operating cycle and from the timing diagram (Fig. 9) the type carrying wheel 8. will rotate 4, 4, 4, 4, 4, 4, 4, 4, 4. or thirty-six teeth, and at about 300 of the operating cycle the Z type will now be in position to print. At 300' of the operating cycle, the speed of rotation of the type wheel is decreased to successively present the type of selected group in the order Z, R, I, and such type are selected for printing in accordance whether the pilot hole is O, X, or R.

Reverting now to Fig. 10, when the operating link 88 is moved to the left to effect the engagement of the type selecting clutch the cam follower extension H8 is in the bottom of the notch I25b of the cam disk I25 and further rotation of the cam I25 in a clockwise direction will, through the following inclined cam portion I25c, cooperate with the cam follower extension II8 to positively I restore the operating link 63 to the right without, however, causing the unlatching of any latched member I I0. At about 330, an extra high cam portion I25d will shift link 63 to the right beyond the Fig. 1b position, and in so doing for those members IIO which have been latched lug I09 will engage the shoulder I28 of the respective member III to rock the same counterclockwise to unlatching position, spring I01 being compressed during this operation to rock the pawl I to normal position shown in Fig. 1b. With respect to any unlatched member IIO, movement of the operating link 83 to the right at this time may also eflect movement of such members IIO but the operation of such is ineffective.

It is desirable to provide means to insure that the clutch release arms 81 are at their normal position and will remain so when engaged by the extremity of the clutch pawls 15 to unlatch the latter from the ratchet teeth 69. Such means now to be described is independent of the springs 19. Referring to Fig. 1b there is pivoted on a shaft I28 a plate which has fixed thereto a comb plate consisting of spring formed fingers I29 which bear against the lower extensions 55 of the clutch release arms 81. Attached to shaft I28 is a follower arm I30 carrying a roller I3I, cooperating with a cam I32 secured to a drive shaft I43. From Fig. 9 it will be seen that a cam rise I32a operative at about 306 of the operating cycle is to rock the shaft I28 counterclockwise, pressing the spring fingers I29 against the related extensions 85 of the clutch release arms 61, positively retracting them to the normal position shown in Fig. la. Thus, it is insured that clutch release arms 01 will be in such position that they will be in the path of the .free ends of the clutch pawls 18 to move them to unclutching positions.

A low portion I32b of such cam I32 is effective to enable the follower arm I30 to be rocked by a spring I38 to cooperate with such low portion I32b which releases the spring pressure on the clutch release arm 81 to free the latter for rocking to engage the type selecting clutch.

Upon analysis of such 0, X, R holes through circuits to be described, the second energization of the magnet 8| again attracts its armature I I and shifts link 8. The latter thereupon rocks the effective to cooperate with the follower roller I31 clutch release arm I24 to unlatch the clutch release arm 88 of the printing clutch. At this time a low portion I20c (see Figs. 1a and 9) of cam I20 cooperates with the cam follower extension I2I so as not to restrain the rockin of clutch release arm I24. When the clutch release arm 88 is unlatched, 0. depending extension I21 moves in a clearance portion I28 of said arm I24. Cam disk 88 will now rotate clockwise and the cam extension 88 will strike the follower extension 84 at the time the selected type is at the printing line to effect the printing impression.

It is undesirable to have the clutch release arm 88 released whenever link H8 is rocked the first time to rock arm I24, due to the analysis of card holes l-9 and to this end a high portion I 31a of cam I81 cooperates with arm ,88 to block it against movement to release the printing clutch during the analysis of holes 1-9. When holes 0, X and R are analyzed the low portion of cam I31b (see Fig. 9) will cooperate with clutch release arm 88 to permit its rocking to engage the printing clutch. After the analysis of the O, X, R, holes, the cam rise I310 of cam I31 will function to positively retract the clutch release arm 88 to normal position to cause disengagement of the clutch release pawl 81 after a complete revolution of the printing While the operation of the machine has been described in connection with the selection of the group of type under control of the 9 card hole, the same principle of operation for effecting the above results is involved for other holes as is evident from the following table.

Mechanical impulse at- Cams at medium Members latched cam portion Hole Degrees 110A, 1100 100B, 100D. 110A 1003, 1000, 100]).

100A, 100B, 100D. 100A, 100B, 1000.

It will be recognized from this table that the concurrent position of cams I00 at a medium height cam portion for those cams which have not previously latched members H0, will determine the time the mechanical impulse is transmitted.

The machine includes a driving means driven by the shaft 22 for rotating the cams IO0A, IO0B, 100C and IO0D, I20, I25, I32, and I31 in synchronous relationship and such cams are'driven one complete revolution for each operating cycle.

The driving means for driving cams IO0A, I003, INC and IO0D will now be described. Secured to shaft 22 is a gear I40 (Fig. 3) which, through a gear I, drives a gear I42 secured to the drive shaft I43 for the cam IO0D and cam I32. Shaft 22 is extended, as shown in Fig. 5. to directl drive the cam IO0C. Referring to Fig. 3, gear I40, through a gear I44, drives a gear I45 secured to the drive shaft I46 for cam IO0B. Gear 145, through an idler gear I41, drives a gear I48 secured to the drive shaft I49 for the cam IO0A.

v the digit type 9-1.

QABSJ)? 1 15 By such driving means the cams 36A, I668, lilllC, H161), and H32 are driven synchronously.

Referring to Fig. 3 gear M l has rotatable therewith a gear I50 which, through an idler gear lti, drives a gear I52 attached to the shaft 1153 to which the cam 1125 is secured.

Gear I56 also meshes with a gear 456 secured to a shaft I55 to which shaft the cam H26 is secured.

Also referring to Fig. 3 to drive shaft 38 there is secured a gear I55 which meshes with a larger gear 551 secured to a shaft I58 to which shaft the cam H31 is secured.

Thus, through the intergearing last described, the operating cams H26, l2? and i231 are driven synchronously with the operating cams ittA, WEBB, i660 and 666D.

Operation of machine in connection with wiring diagram (Fig. 8)

Fig. 8 illustrates the wiring diagram for a plurality of orders, each of which is wired alike for either numeric, alphabetic listing, or for printing special symbols in a manner to be later described.

The card analyzing brushes related to the selected controlling card columns terminate at plug sockets I66, and plug connections tel are made therefrom to the plug sockets H52 of the selected printing orders for printing numerical, alphabetical or special characters.

The print control circuit is from the line 24, through CF1, CRI circuit breaker contacts, relay contacts R3A closed during analysis of all card holes, contact roll of LB analyzing brushes I1,

plug socket I60, plug connection I6I, plug socket I62, cam operated contacts I63 closed during analysis of all card holes 9-1, 0, X, R (see Fig. 9), print vmagnettl, contacts I66, cam contacts I61 closed during analysis of 9-1 card holes, to line 23.

.Thus for numeric listing digits 9-1 the above circuit is closed to energize print magnet 6| and thus through the translator and converterselect Printing of. in orders to the right of the significant digit 1-9 in the highest order is described in the subsequent section Zero print control circuit.

The transmission of the N impulse to cause engagement'of the printing clutch to print digits 1-9 is effected by a circuit from line 24, through contacts I64 closed at about 189 by a cam I8I driven by shaft 22 (see Fig. 9), print control magnet 6| and contacts I65 now closed in a manner which will be presently explained, to line 23. The N impulse causes the printing clutch to be engaged to initiate rotation of printing cam 85 at a time which will effect an imprint from the selected digit type 1-9, and from the 0 type in a manner to be explained later.

Contacts I 65, I66 are provided for each order and are controlled by the arrangement shown in Fig'la for one order. Pivoted on a rod MI is a double arm I12, I13 urged by a spring I14 so that a projection I15 of arm I12 normally rests upon a high part Ia of a cam I10. Cam I10 is secured to a shaft I16. From Fig. 3 it will be seen that to shaft I16there is secured a. gear I11 intermeshing with a gear I18 secured to the shaft dinates projection I with the lowest part I10b of cam I10, thus enabling spring I14 to rock arm I12, I13 slightly until the extremity of arm I13 rests upon a shoulder I19 of clutch release arm contacts I69 close at the same time.

I26 but in so doing there is no change in the position of contacts 466, !65. However, whenever link IE6 is shifted to the left to rock the clutch release arm I24 due to the energization of print control magnet 6i when card holes 9-1, 0, X, R are analyzed, shoulder I19 is moved away from the extremity of arm I13, and thus the action of spring I14 causes contacts M6 to open and contacts N55 to close. The low part I16?) of cam 116 extends up to 255, enabling transfer of contacts I66l66 as a result of the analysis of any of the holes 9-1, 0, X, R. After 255 a cam portion i100 of cam I16 is operative to cam arm I12, 313 to normal to again be relatched by clutch release arm l2 l.

It is explained that to avoid arcing at the contacts I65, l66, these contacts are so arranged as to have contacts N5. make before contacts I66 break, thus maintaining the continuity of the circuit at this point.

Contacts E66 are, of course, normally closed to enable the closure of the print circuit for type selection, and as a result of the analysis of card holes 1-9, O, X, R contacts H55 are closed at the time the N impulse is transmitted by cam operated contacts I64 to the print control magnet 6 I.

Zero print control circuit The zero print control circuit herein is operative to cause'printing of zeros at the right of the significant digit 1-9 of highest order, such as each 0 in the number 500. Obviously, when zeros are represented in card columns to the left of a significant digit 19, such zero printing should be suppressed. An example of the latter is the number 005, where only 5 should be printed and 0 suppressed in the tens and hundreds order.

The successive denominational orders are interconnected by plug connections I (Fig. 8), which is a step necessary for zero print control. The operation in printing the number 500 will 'now be described. In the hundreds order, the 5 hole will be first analyzed and through the translator and converter the print Wheel 60 will be initiated in rotation to select the 5 digit. Contacts I65 in this order are now closed.

In the units and tens order 0 holes are subsequently analyzed but the completion of the circuit to print control magnet BI is different than when digit holes 1-9 are analyzed. After the 1 index point has been analyzed and before a 0 hole is analyzed, cam operated contacts I68 close and contacts I61 open. Also cam operated pulse from the 0 hole in the units column now extends from contacts I63, through units order magnet 6|, through units order contacts I66, tens order contacts I68, plug connection I80, tens order contacts I69, thence through tens order contacts I66, hundreds order contacts I68, plug connection I80, hundreds order contacts I69, hundreds order contacts I65 previously closed because of the analysis of the 5 hole in the hung d-reds order, to line 23. Since it is assumed that a 0 is also in the tens order the circuit extends from the print magnet SI of such order, tens order contacts I66, hundreds order contacts I68,

- order of the highest significant digit may com- Dlete circuits to 'nrint nnnh-nl mnnrnn+e n A;

The im- 1 17 one or more lower orders upon analysis of the holes in such orders.

Hence, for such lower orders print magnet 6| is energized at about 143, related link H6 is rocked to engage the printing clutch initiating rotation of print control cam 65. None'of the latching members III] is latched due to the fact that "high" contours of the cams I66 are not effective at this time. Hence the type selecting clutch is not engaged at this time but is later,

1 as will be explained.

However. for all printing orders, contacts I65 are closed at the time the N impulse is transmitted by contacts I64 at about 189.

. The impulse directed to the print control magnet 6I for each order at the N impulse time will rock the latch member IIOA since the associated cam IMA presents a high portion to such latch member at about 189, which is the machine time for the N impulse.

At about 300 the remaining cams I003, I660, IOID associated with the remaining unlatched members H63, H00, IIDD present medium "Height" cam portions to such. unlatched members and operating link 63 is now rocked in the units, tens and hundredsorders. This operation of link 63 for the hundreds order is ineffective because the type selecting clutchof this order was previously engaged. For the units and tens order, it is evident that at 300 cam extension 66 of cam 65 is operative to rock print wheel carrying arm 6| to print from the type 0 and after the impression has been effected the type selecting clutch is engaged due to the aforesaid shifting of link 63. This will merely result in an idle complete revolution of the printing wheel 66 after printing a zero. Hence, zeros in orders to the right of the digit 1-9 in any order are automatically printed.

The manner to effect suppression of zeros in orders to the left will now be described.

Taking the number 005 as an example, printing of the digit 5 is efiected by engagement of the type selecting clutch of units order to select the 5 digit type for printing. In th tens order at the time the 0 hole is analyzed the circuit extends from tens order print magnet 6i, tens order contacts I66, hundreds order cam operated contacts I66 and I69 now closed (see Fig. 9) and for the tens order the circuit to tens order print control magnet Si is broken by the hundreds order contacts I65 now open. The print magnet circuit for the hundreds order will continue from hundreds order print magnet 6i, through hundreds order contacts I66 now closed, to cam operated contacts I68 pertaining to the one not used for printing, and thus broken at this point. Obviously, each zero printing circuit to the left of an order having a significant digit representation 1-9 will be incomplete. Therefore, for such orders the print wheel 60 will not be rocked and 0 printing is suppressed.

Circuit connections for alphabet numerical, and special character listing J18 treme left. For numeral listing only plug connection III is omitted.

It will be recalled, referring to the code of Fig. '7, that a O, X, R hole is preceded by a digit hole 1-9. For alphabetic type group selection the circuit is from line 26, cam'contacts I63 closed at 9-1, 0, X, R, print magnet 6i, contacts I66, cam contacts I61 closed during 9-1. After the first energization of print magnet 6I contacts I66-I66 transfer in a manner previously described to close contacts I66 and open contacts I66. The second impulse under control of card holes 0. X, R is then from line 26, cam contacts I63 also closed during 0, X, R, print magnet 6i, contacts I66 to line 26. This second energization to print magnet 6| will eflect the selection of type of the selected group according to the 0, X, R holes used as pilot holes.

Of course, the N impulse transmitted for numeric listing will also be transmitted to the print control magnet 6| but for alphabetic listing this is ineffective due to the previous engagement of the printing clutch when 0, X, R holes are analyzed. If so desired such N impulse circuit could be rendered inoperative but since it is ineilective it is preferred that it should be included in order that circuits be alike for numeric and alphabetic listing.

Selection of printing characters by digit holes in combination and in combination with O, X and R From the code in Fig. 7 it will be observed that ten numeral characters 0-9 are selected by holes appearing in a column singly and twenty-six alphabetic characters by a single digit representing hole 1-9 in combination with R, X and O. The 81" symbol is selected by digit holes 1 and 0, in combination and for this symbol the type selecting system operates in the manner previously described.

The type selecting arrangement now to be described extends the usefulness of the machine by enabling eight additional type characters to be selected by two digit holes in combination which are in combination with O, X and R or the N machine impulse. From the code shown in Fig. '1 it will be observed that card holes 8-3 in combination with 0, X and R card holes, or in the absence of such 0, X, R holes the N machine impulse will select four different symbols, and. card holes 8-4 in the same combination with O, X, R. and N will select four other different symbols.

Taking into consideration the means for selecting the group of characters when the 8-4 holes appear in combination in a controlling column, it will be evident from Fig. 9 that when the 8 hole is analyzed, member IIIlA will be latched and when the 4 hole is subsequently analyzed, members I I60 and I ID will be latched. At about 108 of the machine cycle cam IIlIlB associated with the unlatched member IIUB will present its "medlum" cam portion to such member and the link 63 will now be unlocked at four points and concurrently therewith, cam follower extension II6 of arm I I3 will be aligned with the 8-4 notch of cam I26. Therefore, at this time, operating link 63 will be moved to the left, transmitting a mechanical impulse which rocks the clutch release arm 61 to initiate the rotation of the printing wheel at substantiallly of the operating cycle. This will cause a rotation 01 the printing wheel to an extent of 44-48 teeth, successively presenting the group of symbols (see Fig. 1a), to the printing line.

The means for selecting symbols from such groups comprises the 0, Xand R card holes operating in the manner previously described. In the absence of such card holes ca'm operated contacts I64 transmit the N impulse at a time to engage the printing clutch which selects the symbol. Referring to Fig. 8, in view of the similar wiring connections for each printing order, any printing order may be utilized for such symbol printing and herein is exemplified by a plug connection I6I between the column 4 plug socket I60 and plug socket I62, utilized for either numeric, alphabetic or special character printing. Upon analysis of the 8 card hole contacts I65, I66 transfer so that the second impulse upon analysis of the "4 card hole, and the third impulse uppon analysis of the O, X, R holes will energize the print control magnet 6 I. Due to the high part I3'la of cam I31 the printing clutch will not be engaged until 0, X, R holes are analyzed to thereby engage the printing clutch at a time in the operating cycle depending upon the O, X, R card hole analyzed. This will time the rocking of the print arm 8| to select the desired symbol. Obviously, in the absence of such 0, X, R holes the cam contacts I64 will transmit the third impulse at about 189 of the operating cycle to the print magnet 6|, thus engaging the printing clutch at a much later time in the cycle with respect to the O, X and R holes. Printing cam 85 will then be effective to rock the print arm 8i at the time the diagonal symbol is presented to the printing line.

The same printing order will cause printing of selected characters of another group whenever the 8-3 holes appear in combination and the symbols of such group are selected by the O, X, R holes in combination therewith. In the absence of O, X, R holes the N machine impulse selects a symbol. Briefly, upon analysis of the 8 hole, member I-IOA will be latched and upon analysis of the 3 card hole, member IIOB will be latched. The cams IOC and ND present their medium cam portions to their respective unlatched members H00 and OD at 123 of the operating cycle, at which time 8-3 notch of cam I25 is correlated with the cam follower extension II8 of arm II3 (see Fig. 1b). This will enable the operating link 63 to move to the left to transmit ,a mechanical impulse to the clutch release arm 61 and the printing wheel 60 will be initiated in its rotation at approximately 135 of the operating cycle to rotate the printing wheel 40- teeth and successively present the to the printing line. A selection of the first three symbols is determined by the presence of the card holes 0, X and R and in the absence of such card holes the N machine impulse will select the symbol. The manner of selecting such symbols is similar to that previously de-= scribed and it is thought unnecessary to repeat the description.

Selection of printing characters by 0, X, R holes and N machine impulse The print wheel 60 is provided with a group of characters 0 the first three of which are selected by the O, X, R holes and the fourth or by the absence of such holes. The N machine impulse is used to select and effect printing from the 3 character.

The mode of operation for selecting the group of such type characters and selecting individual type of such group is different from that previously described, in that there is first an initial selection of these type characters when the O, X and R holes are analyzed, and thereafter the N machine impulse causes the engagement of the printing clutch to effect the initial rotation of the printing wheel. The previous description set forth in detail the manner of selecting 0 for numeric listing and herein is repeated since it forms part of a group of special type symbols.

Cam contacts I60 close at O, X, R, N impulse times (see Fig. 9). Upon analysis of card holes 0, X, R the circuit extends through cam contacts I63, print magnet 6|, contacts I66, cam contacts I68, plug connection I83, cam-contacts I69, to line 23. After analysis of the O, X, R holes, contacts I66, I64 transfer so that the N impulse transmitted when contacts I64 close is now directed through contacts I65 to line 23.

In the absence of any holes 0, X, R, the symbol is selected when special plug connections to be later described are made.

At this time, the selection of the 0 symbols by the O, X and R holes respectively will now be considered. At the time such card holes are analyzed, a low portion I3'Ia (Fig. 1a) of cam I31 is coordinated with clutch release arm 68 to enable the impulse transmitted to the print control magnet 6| to release the clutch release arm 88 as the O, X, R holes are analyzed and initiate the rotation of the printing cam 85. However, no members I I0 are latched during such analysis because none of the cams I00 present high portions to any latching member IIO. When the O, X, R holes are analyzed, the printing cam will be initiated in its rotation at a time in the operating cycle dependent upon the O, X, R hole analyzed so that the cam extension 63 will be in a position to rock the printing arm 8I at the time the related type are successively presented to the printing line. It is pointed out that for selection of 0 symbols, rotation of the printing cam 85 will occur before the type selecting clutch is engaged.

In the absence of any digit holes 9-1 in a controlling column the N machine impulse directed by the cam operated contacts I64 after 0, X, R holes are analyzed will again energize print magnet 6| to initiate the rotation of the print wheel 60 to bring the group of characters 0 to the printing line in succession in the following manner: The impulse directed to the print control magnet 6| at the N impulse time will rock the latch IIIlA since the associated cam IOOA (Fig. 9) presents a high" portion (N) to related latching member IIOA at about 189 which is the N machine impulse time. The remaining cams I003, I000 and IO0D associated with the unlatched members present medium height cam portions at about 294 of the operation at which time the notch N of cam I25 is aligned with the follower extension II8 of the arm II3, enabling the operating link 63 to be shifted about 294 to the left to effect engagement of the type selecting clutch at substantially 300 of the operating cycle. It should also be noted that cam I32 is in such position at the time the link 63 is shifted at 294 that a low portion I32b is presented to the follower roller I3I to enable th free rocking of the clutch release arm 61. At about 300 the print wheel will move uniformly with a decreased speed and when the selected character 0 is presented to the printing line the previously rotated cam 85 will now be in a position to rock the printing arm ill to effect printing of the selected character.

7 It is pointed out that the N machine impulse 21 189'will againcausetheclutchreleasearm l to be rocked but due to the previous release clutch release arm '88 upon analysis of the O, X and R holes, this second operation will be ineflective.

Automatic printing of 8 symbol The 9 symbol of the group of characters now being considered can be selected in the absence of any holes in the controlling column. This autunatic printing of the t symbol is particularly useful in check writing operations where it is desirable to print such symbols automatically to the lotto! the highest digit of the .amoimt on the check. For example, if the check was four denominations! orders, it would be printed $24.25.

If the check was ior an amount only in the two lower denominational orders by suitable plug connections I", automatic printing oi.- this symbgi 2would print the amount on the check as To print such symbol in selected denominational orders at the left, a plug connection I84 is made so as to continue the circuit from ca'm contacts I88 through such plug connection I84 and cam contacts I85 to line 23. It will be noted from Fig. 9 that cam contacts I85 close at the N machine impulse time. In the absence of any holes in the controlling column at the N impulse time, a circuit will be closed from the line 24 through cam contacts I84, through the print control magnet contacts I88, cam contacts I88, plug connection "Loam contacts I85 to line 28. Understanding, as previously described, that the N machine impulse initiates the rotation of the print wheel 80 to select the group of type characters 0, e, s, in the absence of the O, X and R card holes the movement of the print wheel 88 at a uniform decreased speed will continue to finally bring the t symbol to the printing line. Of course, it 0, X and R. holes are not in the controlling column, at the time the N machine impulse is transmitted to the print control magnet I at 189, the link H9 will be shifted to rock the clutch release arm I24 to unlatch the clutch release arm 88. Thus, at this point in the opersting cycle the printing clutch is engaged to initiate the rotation of the print cam 85 and at the time the 9 symbol is presented to the printing line the cam extension 83 will be in position to engage the follower extension 84 to rock the printing arm 8| and to effect an imprint from the a symbol. Summarizing, in the event that a controlling column has no holes, the machine impulse will select a group of type characters and concurrently select a type within that 8 111 The arrangement for automatic printing of zeros and the required suppression of such zeros ior numerical listing and the simplified manner for eiiecting automatic printing which has just been described is shown and described herei to give a complete disclosure of the printing mechanism as constructed.

While there have been shown and described and pointedout the fundamental novel features oithe invention, as applied to a preferred embodiment, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

alphabet type, further means operating independently of said last named means and operable in the absence of holes 1-9' to eflect the rotation of said printing wheel to select said auxiliary group of type, and type selecting control means controlled by said analyzing means and operable inresponse to the analysis of the O, X, R holes for selecting type of. the selected group of alphabet type and said auxiliary group of type when the latter is selected for operation.

2. In a machine controlled by records of the type having holes at digit positions l-9, O, X, R, a rotatable printing wheel carrying several groups of alphabet type and an auxiliary group of type. means for analyzing said records, means controlled by said analyzing means and operable in response to the analysis or holes at digit positions 1-9 to select the related groups of alphabet t pe, means for effecting an impression from selected type oi the selected alphabet or auxiliary group. type selecting means controlled by said analyzing means for initiating the operation of said impression effecting means at diflerential times according to and as the holes 0, X, R are analyzed, and means operable in the absence of digit holes 1-9 for initiating and effecting the rotation of said printing wheel to select said auxiliary group of type and to cause the type of the auxiliary group to be successively positioned at the printing point as said impression efiecting means is operable to eiiect a printingimpression from the type selected by the difierential time said impressioneflecting means is rendered operable.

3. In a machine of the class described controlled by records having holes at digit positions 1-9, 0, X, R, a rotatable printing wheel carrying several groups of alphabet type and an auxiliary group of type, means for analyzing said records, means for rotating said-wheel at one speed in response to the analysis oi digit holes 9-1 to select a group of alphabet type, and for rotating said wheel at a reduced speed to effect printin from a selected type of the selected alphabet or auxiliary group of type according to the O, X, R holes, type selecting means controlled by said analyzing means to effect impressions from the selected type of the selected alphabet or auxiliary group according to the O, X, R holes analyzed; means operable independently of the record analyzing means and in the absence of digit holes 1-9 for initiating the rotation of said printing wheel at the time said printing wheel is being rotated at a reduced speed to successively present the type of the auxiliary group to the printing point as said type selecting meam is operable according to the O, X, R hole is analyzed toefiect an impression from the selected type of the auxiliary group.

4. In a printing machine controlled by records having holes at 1-9 for alphabet type group selection and holes at O, X, R for selection of alphabet type of a selected group and type of an auxiliary group, a rotatable printing wheel carrying said groups or type, means for analyzing holes 

